keyboard/qmk/quantum/rgb_matrix_animations/breathing_anim.h

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#ifndef DISABLE_RGB_MATRIX_BREATHING
RGB_MATRIX_EFFECT(BREATHING)
# ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS
bool BREATHING(effect_params_t* params) {
RGB_MATRIX_USE_LIMITS(led_min, led_max);
HSV hsv = rgb_matrix_config.hsv;
uint16_t time = scale16by8(g_rgb_timer, rgb_matrix_config.speed / 8);
hsv.v = scale8(abs8(sin8(time) - 128) * 2, hsv.v);
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RGB rgb = rgb_matrix_hsv_to_rgb(hsv);
for (uint8_t i = led_min; i < led_max; i++) {
RGB_MATRIX_TEST_LED_FLAGS();
rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
}
return led_max < DRIVER_LED_TOTAL;
}
# endif // RGB_MATRIX_CUSTOM_EFFECT_IMPLS
#endif // DISABLE_RGB_MATRIX_BREATHING